Craneflies

Craneflies are very large Diptera which resemble large mosquitoes but are
preferred by fish because of their abundance. The pupa is not available
for fish. The cranefly larva is one to two inches thick and meaty,
burrowing in and around the bottom structures of lakes and streams. When
the larva is dislodged they curl up into a ball or react by elongating
like leeches. No matter what stage the larva is in, trout will eat them.
Cranefly adults actively mate, laying eggs along the water’s edge.
They dance and flutter, catching the trout’s attention, making
craneflies readily available to them.